/* KB Public Site Styles */

/* Accessibility: visually hidden but readable by screen readers */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
:root {
    --kb-theme: #4c75ab;
    --kb-text: #333;
    --kb-text-light: #666;
    --kb-bg: #f8f9fa;
    --kb-white: #fff;
    --kb-border: #e0e0e0;
    --kb-link: #2563eb;
    --kb-radius: 8px;
    --kb-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
    font-family: 'Rubik', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--kb-text);
    background-color: var(--kb-bg);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

a { color: var(--kb-link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navbar */
.kb-navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--kb-theme);
    color: #fff;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.kb-navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    font-size: 18px;
    font-weight: 500;
}

.kb-navbar-brand:hover { text-decoration: none; color: #fff; }

.kb-navbar-logo {
    height: 36px;
    width: auto;
    border-radius: 4px;
}

.kb-navbar-spacer { flex: 1; }

.kb-navbar-link {
    color: rgba(255,255,255,0.85);
    font-size: 14px;
}
.kb-navbar-link:hover { color: #fff; text-decoration: none; }

/* Hero / Search Section */
.kb-hero {
    background-color: var(--kb-theme);
    color: #fff;
    text-align: center;
    padding: 48px 24px 56px;
}

.kb-hero h1 {
    font-size: 28px;
    font-weight: 500;
    margin: 0 0 24px;
}

.kb-search-form {
    max-width: 560px;
    margin: 0 auto;
    position: relative;
}

.kb-search-input {
    width: 100%;
    padding: 14px 48px 14px 20px;
    font-size: 16px;
    border: none;
    border-radius: 28px;
    outline: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    color: var(--kb-text);
    background-color: var(--kb-white);
}

.kb-search-input::placeholder { color: #999; }

.kb-search-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: var(--kb-theme);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.kb-search-btn:hover { opacity: 0.9; }

/* Content Container */
.kb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Category Cards Grid */
.kb-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    padding: 40px 0 60px;
}

.kb-category-card {
    background: var(--kb-white);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    padding: 24px;
    border: 1px solid var(--kb-border);
}

.kb-category-card h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--kb-theme);
    color: var(--kb-text);
}

.kb-topic-group { margin-bottom: 16px; }
.kb-topic-group:last-child { margin-bottom: 0; }

.kb-topic-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--kb-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.kb-article-list { list-style: none; padding: 0; margin: 0; }

.kb-article-list li {
    padding: 6px 0;
    border-bottom: 1px solid #f0f0f0;
}

.kb-article-list li:last-child { border-bottom: none; }

.kb-article-list a {
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-article-list a::before {
    content: "\f15c";
    font-family: "Font Awesome 6 Free";
    font-weight: 400;
    font-size: 12px;
    color: var(--kb-text-light);
    flex-shrink: 0;
}

/* Article Page */
.kb-article-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    padding: 32px 0 60px;
    align-items: start;
}

/* Sidebar */
.kb-sidebar {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: var(--kb-white);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    border: 1px solid var(--kb-border);
    padding: 16px 0;
}

.kb-sidebar-category {
    padding: 0 16px;
    margin-bottom: 8px;
}

.kb-sidebar-category-name {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--kb-text-light);
    padding: 8px 0;
    margin: 0;
}

.kb-sidebar-topic {
    margin-bottom: 4px;
}

.kb-sidebar-topic-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--kb-text);
    padding: 6px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.kb-sidebar-topic-name:hover { color: var(--kb-link); }

.kb-sidebar-topic-name.active {
    color: var(--kb-theme);
    font-weight: 600;
}

.kb-sidebar-topic-name .chevron {
    font-size: 10px;
    transition: transform 0.2s;
}

.kb-sidebar-topic-name.collapsed .chevron {
    transform: rotate(-90deg);
}

.kb-sidebar-articles {
    list-style: none;
    padding: 0;
    margin: 0 0 0 8px;
}

.kb-sidebar-articles li { padding: 3px 0; }

.kb-sidebar-articles a {
    font-size: 13px;
    color: var(--kb-text-light);
    display: block;
    padding: 3px 8px;
    border-left: 2px solid transparent;
    border-radius: 0;
}

.kb-sidebar-articles a:hover {
    color: var(--kb-link);
    text-decoration: none;
}

.kb-sidebar-articles a.active {
    color: var(--kb-theme);
    font-weight: 500;
    border-left-color: var(--kb-theme);
    background: rgba(76, 117, 171, 0.06);
}

/* Article Content */
.kb-article-content {
    background: var(--kb-white);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    border: 1px solid var(--kb-border);
    padding: 32px 40px;
    min-width: 0;
}

.kb-breadcrumb {
    font-size: 13px;
    color: var(--kb-text-light);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.kb-breadcrumb a { color: var(--kb-text-light); }
.kb-breadcrumb a:hover { color: var(--kb-link); }
.kb-breadcrumb .sep { color: #ccc; }

.kb-article-content h1 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 8px;
    line-height: 1.3;
}

.kb-article-meta {
    font-size: 13px;
    color: var(--kb-text-light);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--kb-border);
}

/* Article body typography */
.kb-article-body h1 { font-size: 22px; margin: 24px 0 12px; }
.kb-article-body h2 { font-size: 20px; margin: 24px 0 12px; }
.kb-article-body h3 { font-size: 18px; margin: 20px 0 10px; }
.kb-article-body p { margin: 0 0 16px; }
.kb-article-body ul, .kb-article-body ol { margin: 0 0 16px; padding-left: 24px; }
.kb-article-body li { margin-bottom: 6px; }
.kb-article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    cursor: pointer;
    border: 1px solid var(--kb-border);
}

.kb-article-body pre {
    background: #f4f4f5;
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    font-size: 13px;
    border: 1px solid var(--kb-border);
}

.kb-article-body code {
    background: #f4f4f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.kb-article-body pre code {
    background: none;
    padding: 0;
}

.kb-article-body blockquote {
    border-left: 4px solid var(--kb-theme);
    margin: 16px 0;
    padding: 12px 20px;
    background: #f8f9fc;
    border-radius: 0 4px 4px 0;
}

.kb-article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.kb-article-body th, .kb-article-body td {
    border: 1px solid var(--kb-border);
    padding: 10px 14px;
    text-align: left;
}

.kb-article-body th {
    background: #f4f4f5;
    font-weight: 600;
}

/* Vote Section */
.kb-vote-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--kb-border);
    text-align: center;
}

.kb-vote-section p {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 12px;
}

.kb-vote-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.kb-vote-btn {
    padding: 10px 24px;
    border-radius: 24px;
    border: 2px solid var(--kb-border);
    background: var(--kb-white);
    color: var(--kb-text);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.kb-vote-btn:hover {
    border-color: var(--kb-theme);
    color: var(--kb-theme);
}

.kb-vote-btn.voted {
    background: var(--kb-theme);
    color: #fff;
    border-color: var(--kb-theme);
    cursor: default;
}

.kb-vote-btn:disabled {
    opacity: 0.6;
    cursor: default;
}

.kb-vote-thanks {
    font-size: 14px;
    color: var(--kb-text-light);
    margin-top: 8px;
}

/* Search Results */
.kb-search-results {
    padding: 32px 0 60px;
}

.kb-search-header {
    font-size: 16px;
    color: var(--kb-text-light);
    margin-bottom: 24px;
}

.kb-search-header strong { color: var(--kb-text); }

.kb-result-item {
    background: var(--kb-white);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    border: 1px solid var(--kb-border);
    padding: 20px 24px;
    margin-bottom: 12px;
    transition: box-shadow 0.2s;
}

.kb-result-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.kb-result-item h3 {
    margin: 0 0 4px;
    font-size: 16px;
}

.kb-result-item h3 a { color: var(--kb-text); }
.kb-result-item h3 a:hover { color: var(--kb-link); }

.kb-result-meta {
    font-size: 12px;
    color: var(--kb-text-light);
    margin-bottom: 6px;
}

.kb-result-item p {
    font-size: 14px;
    color: var(--kb-text-light);
    margin: 0;
    line-height: 1.5;
}

.kb-no-results {
    text-align: center;
    padding: 48px 24px;
    color: var(--kb-text-light);
}

.kb-no-results h3 { color: var(--kb-text); margin-bottom: 8px; }

/* Footer */
.kb-footer {
    background-color: var(--kb-theme);
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 20px 24px;
    font-size: 13px;
    margin-top: auto;
}

.kb-footer a { color: rgba(255,255,255,0.9); }

.kb-footer-version {
    display: inline-block;
    margin-left: 12px;
    padding: 1px 8px;
    font-size: 11px;
    font-weight: 500;
    background: rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.6);
    border-radius: 10px;
    letter-spacing: 0.5px;
    vertical-align: middle;
}

/* Image Modal */
.kb-image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 1000;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.kb-image-modal.active { display: flex; }

.kb-image-modal img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: 4px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.kb-image-modal-close {
    position: absolute;
    top: 20px;
    right: 24px;
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    background: none;
    border: none;
    line-height: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .kb-article-layout {
        grid-template-columns: 1fr;
    }

    .kb-sidebar {
        position: static;
        max-height: none;
        margin-bottom: 16px;
    }

    .kb-categories {
        grid-template-columns: 1fr;
    }

    .kb-hero h1 { font-size: 22px; }
    .kb-hero { padding: 32px 16px 40px; }

    .kb-article-content { padding: 20px; }

    .kb-navbar { padding: 0 16px; }
}

@media (max-width: 480px) {
    .kb-search-input { padding: 12px 44px 12px 16px; font-size: 14px; }
    .kb-search-btn { width: 34px; height: 34px; }
}